Rolling support for slide-valves



(No Model.)

W} T. REASER.

ROLLINGSUPPORT FOR SLIDE VALVES. No. 404,363. Patented May 28, 1889.

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UNITED STATES PATENT OFFICE.

WARREN T. REASER, OF FAIRMONT, NEBRASKA, ASSIGNOR TO THE'ROUND VALVECOMPANY, OF CHICAGO, ILLINOIS.

ROLLING- SUPPORT FOR SLIDE-VALVES.

SPECIFICATION forming part of Letters Patent No. 404,363, dated May 28,1889.

Application filed December 31,1888- Serial No. 295,092. (No model.)

To all whom it may concern.-

Be it known that I, \VARREN T. REASER, a citizen of the United, States,residing at Fairmont, in the county of Fillmore and State of Nebraska,have invented certain new and useful Improvements in Rolling Supportsfor Slide-Valves, of which the following is a specification.

The object of my invention is to obviate the difficulties usuallyexperienced in the use of this kind of rolling support for slide-valvesby the flattening and compressing of the ends, causing a considerablefriction and rapid wearing away of the teeth which hold them in I 5position and making it necessary to substitute new ones and to make anentire readjustment of the valve, causing more or less delay and loss oftime, which can by the use of my invention be entirelyovercome bysubstituting one set of steel surface-pieces for another when worn out,thus making the supports as good as new without disturbing theadjustment of the valve in the least.

Referring to the accompanying drawings,

Figure 1 is a side elevation of a valve supported by antifrictionrollers cut away at the sides in the usual way and provided with mysteel surface-protectors, the ends of the rolling supports beingre-enforced by steel segments and the valve-seat and cap being providedwith steel rack-plates let into-and flush with their surfaces, all thesepieces being interchangeable, so as to facilitate the substituting ofnew pieces for the old ones when worn out. 3 5 Fig. 2 is a verticalsection through the center of one of the rolling supports, showing themethod of fastening the steel segments in place. Fig. 3 is a side view,and Fig. 5 a plan of a segment. Figs. 4 and 6 are a side view and planof the rack-plate.

In .the drawings like letters indicate like parts in the several views.

A is the Valve-seat, having the rack-plates a a setin recesses providedfor that purpose. B B are the rolling supports re-enforced by thesegments 1) l).

The dotted lines 0 C show steam-ports.

D is the exhaust-port.

E is a cap bolted to the back of the valve and resting on the rollingsupports, relieving the valve of friction contact with its seat.

To use my invention, the rolling supports and valve-seat and cap areprovided with suitable recesses to receive the hardened steel segments1), and rack-plates c, which should be made to a standard size, so as tobe interchangeable and easily replaced when worn out.

I am aware that rolling supports have been used heretofore, but withoutbeing protected from wear, as proposed by my invention. I am also awarethat movable wearing-pieces have been used in mechanism at various timesand do not therefore claim either of these devices, broadly, but limitmy claims to the special construction of parts hereinbefore de scribed.

WhatI claim, and desire to secure by Letters Patent, is

1. As an impro\"ement in slide-valves for steamcngines, the rollingsupports for said valves recessed at their ends and provided withwearing-surfaces, and toothed segments 12 I), inserted in said recessesand adapted to be removed and replaced by others when worn,substantially as set forth.

2. As an improvement in slide-valves for steam-engines, the removablerack-plates a and 0, set into recesses formed in the valveface A and capE, said plates having plane wearing-surfaces adapted to receive the wearof the rolling supports B, substantially as specified.

3. As an improvement in slide-valves for steam-engines, the rollingsupports B, provided with removable segments 19, in combination with avalve-face, A, the valve and cap E, said face and cap provided withremovable toothed plates a and c, all arranged for joint operation inthe manner and for the purpose 0 shown and described.

In testimony whereof I affix my signature in the presence of twowitnesses.

WARREN T. REASER.

lVitnesses:

J. W. ROGERS, O. 0. WINTER.

